title: Remarkable performance of Ir1/FeO(x) single-atom catalyst in water gas shift reaction.
abstract: High specific activity and cost effectiveness of single-atom catalysts hold practical value for water gas shift (WGS) reaction toward hydrogen energy. We reported the preparation and characterization of Ir single atoms supported on FeO(x) (Ir1/FeO(x)) catalysts, the activity of which is 1 order of magnitude higher than its cluster or nanoparticle counterparts and is even higher than those of the most active Au- or Pt-based catalysts. Extensive studies reveal that the single atoms accounted for ∼70% of the total activity of catalysts containing single atoms, subnano clusters, and nanoparticles, thus serving as the most important active sites. The Ir single atoms seem to greatly enhance the reducibility of the FeO(x) support and generation of oxygen vacancies, leading to the excellent performance of the Ir1/FeO(x) single-atom catalyst. The results have broad implications on designing supported metal catalysts with better performance and lower cost.
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Lin
authors.forename: Aiqin
authors.initials: A
authors.lastname: Wang
authors.forename: Botao
authors.initials: B
authors.lastname: Qiao
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Liu
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Yang
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Wang
authors.forename: Jinxia
authors.initials: J
authors.lastname: Liang
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Jingyue
authors.initials: J
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Zhang